X10 Is not Blocking Websites

I'm trying to set up my X10/R9000 to block Roblox, so my kids will do their homework .  I've entered the keyword "Roblox", set blocking to always, and clicked Apply.  However, the site is still accessible.     My firmware is  the latest (V1.0.5.42).  

I've tried adding other sites, like CNN, but can access them  too. 

I've looked at the various posts on this board, but was not able to locate a solution.

Ironically, Robox is the example the Netgear uses in its support  article on setting up blocking (Article ID: 24053).   Does anyone have any ideas.  THANKS!!